Trimble Inc. 7112-900IP 사용자 설명서
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Overview
A TC900 radio modem is part of a digital-data radio network. It is designed
primarily for broadcasting low-latency differential GPS (DGPS) corrections or
raw GPS data from a roving receiver (machine) to a repeater or reference station
receiver, for use during real-time differential and real-time kinematic (RTK)
surveying.
primarily for broadcasting low-latency differential GPS (DGPS) corrections or
raw GPS data from a roving receiver (machine) to a repeater or reference station
receiver, for use during real-time differential and real-time kinematic (RTK)
surveying.
1.1
TC900 Rovers as part of a TRIMCOMM 900 Network
To achieve line-of-sight (LOS) coverage to all points in a work area, a
TRIMCOMM 900 network including up to four repeaters must be used. The
repeaters retransmit data packets according to a simple time-sharing scheme to
avoid mutual interference. The operation of the repeaters is transparent to the
TC900 rovers. This means that a TC900 rover can move around and pick up data
packets from the reference station or any repeater, whichever it hears first.
TRIMCOMM 900 network including up to four repeaters must be used. The
repeaters retransmit data packets according to a simple time-sharing scheme to
avoid mutual interference. The operation of the repeaters is transparent to the
TC900 rovers. This means that a TC900 rover can move around and pick up data
packets from the reference station or any repeater, whichever it hears first.
The reference, rovers, and repeater radios in a TRIMCOMM 900/ TC900
network are similar units. The function of a particular unit (reference, rover, or
repeater) is determined by its configuration.
network are similar units. The function of a particular unit (reference, rover, or
repeater) is determined by its configuration.
Reference radios can be connected to 7400, 4400, or 4000 Series Trimble
receivers through a single cable for both power and serial I/O.TC900 rover
radios, as used in the CAES system (Computer Aided Earthmoving System), are
usually installed on a machine, and are used with a 740 rugged receiver. They are
also connected to the receiver through a single cable for both power and serial
I/O.
receivers through a single cable for both power and serial I/O.TC900 rover
radios, as used in the CAES system (Computer Aided Earthmoving System), are
usually installed on a machine, and are used with a 740 rugged receiver. They are
also connected to the receiver through a single cable for both power and serial
I/O.
TRIMCOMM 900 repeaters operate autonomously, requiring only external
power connected to their power ports. They have up to two separate serial ports.
For typical GPS applications only one serial port is used. Machine control
applications may use one serial port for GPS corrections, while the other serial
port is connecting computers in a wireless network.
power connected to their power ports. They have up to two separate serial ports.
For typical GPS applications only one serial port is used. Machine control
applications may use one serial port for GPS corrections, while the other serial
port is connecting computers in a wireless network.
TC900 rovers operate as part of the CAES system, and they are powered by the
machine on which they are installed. Both serial ports are used, one for GPS
corrections and the other for data.
machine on which they are installed. Both serial ports are used, one for GPS
corrections and the other for data.